Posttraumatic stress disorder (PTSD) is associated with neurocognitive and psychiatric comorbidities, and older adults experience comorbid illnesses disproportionately. Little is known about the comorbidities of PTSD among older veterans. This systematic review examines the prevalence, incidence, and patterns of neurocognitive and psychiatric comorbidities of PTSD among older veterans and explores the factors associated with these comorbidities.. To read the full article, log in using your NHS Athens details. To access full-text: click “Log in/Register” (top right hand side). Click ‘Institutional Login’ then select 'OpenAthens Federation', then ‘NHS England’. Enter your Athens details to view the article.